Abstract
A collection of objects or concepts united by some common property is called a set. For example, one speaks of the set of symbols in a printed line, the set of natural numbers, the set of persons who are currently university students and so on. The objects comprising a set are its elements. Throughout the following, sets will be denoted as a rule by capital letters and elements by lower case Latin or Greek letters. The statement that an object a is an element of a set A is written briefly as a ∈ A. The notation a ∉ A or \(a\bar \in A\) signifies that a is not an element of A.
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© 1973 Springer-Verlag, Berlin · Heidelberg
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Mal’cev, A.I. (1973). General Concepts. In: Algebraic Systems. Die Grundlehren der mathematischen Wissenschaften, vol 192. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-65374-2_1
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DOI: https://doi.org/10.1007/978-3-642-65374-2_1
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-65376-6
Online ISBN: 978-3-642-65374-2
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